Implement salt states for gva webinterface

- setup listener and pg_hba.conf for PostgreSQL server
- add state code for gva
- add macros for nginx and uwsgi with Python 3 support
- add pillar data for gva

states/postgresql-server/custom.conf

@@ -0,0 +1,11 @@
+listen_addresses = '{{ salt['grains.get']('ipv4') | join(",") }}'
+shared_buffers = {{ salt['pillar.get']('postgresql-server:shared_buffers', '1GB') }}
+work_mem = {{ salt['pillar.get']('postgresql-server:work_mem', '10MB') }}
+maintenance_work_mem = {{ salt['pillar.get']('postgresql-server:maintenance_work_mem', '32MB') }}
+effective_cache_size = {{ salt['pillar.get']('postgresql-server:effective_cache_size', '2GB') }}
+
+lc_messages = 'de_DE.UTF-8'			# locale for system error message
+lc_monetary = 'de_DE.UTF-8'			# locale for monetary formatting
+lc_numeric = 'de_DE.UTF-8'			# locale for number formatting
+lc_time = 'de_DE.UTF-8'				# locale for time formatting
+default_text_search_config = 'pg_catalog.german'

states/postgresql-server/init.sls

@@ -7,3 +7,24 @@ postgresql:
   service.running:
     - require:
       - pkg: postgresql
+
+/etc/postgresql/11/main/conf.d/custom.conf:
+  file.managed:
+    - user: postgres
+    - group: postgres
+    - source: salt://postgresql-server/custom.conf
+    - template: jinja
+    - mode: 0644
+    - require:
+      - pkg: postgresql
+    - watch_in:
+      - service: postgresql
+
+/etc/postgresql/11/main/pg_hba.conf:
+  file.append:
+    - source: salt://postgresql-server/pg_hba_line.conf
+    - template: jinja
+    - require:
+      - pkg: postgresql
+    - watch_in:
+      - service: postgresql

states/postgresql-server/pg_hba_line.conf

@@ -0,0 +1 @@
+host    all             all             {{ salt['pillar.get']('postgresql-server:local-net') }}     md5